Drive tool



Jan. 5, 1965 G..1.zE1'zr-:R ErAl. 3,163,865

DRIVE TODI..

' Filed Sept. 13, 1961 2 Sheets-Sheet 1 Wgr @MW Jan. 5 1965 l s. J. zr-:TzER ETAL 3,153,865

DRIVE TOOL Filed Sept. 13, 1961 2 Sheets-Sheet 2 ff. IIE-lE- Z5 M ETE-14- 40 52 22 44 40 32 Z2 fm 34 ff\ f2, f

INVENTORS 2 AT'TORNEY United States Patent O 3,163,355 DFJVE TL George J. Zetzer and Ciarence L Drache, both of ort iinton, Ghia, assi@ors to Fort Ciinton Manufacturing Company, Fort A-Ciinton, Ghia, a corporation of @fno Filed Sept. 13, 19nd, Ser. No. 137,354 13 Ciaims. tCl. 1--47} members are utilized to form openings in concrete orv masonry to receive the anchor members, the fitting being Vreversible to accommodate both male and female anchor members.

An object of the invention resides in a drive tool having a handle portion of nonmetallic material, a driving plunger functioning in conjunction with a reversible tting for retaining expansible anchor members in position to be driven by the tool.

Another object of the invention is the provision of a drive tool adapted for many purposes and particularly adapted for driving both male and female expansible anchor members into concrete and the like, the drive tool construction embodying a reversible fitting adapted to accommodate both male and female anchor members, the fitting being held to a handle structure by means of a resiliently biased clutch or locking means which automatically biases the fitting into engagement with a handle component.

Another object of the invention resides in a drive tool embodying a reversible fitting wherein one position of the fitting accommodates a female anchor member to be driven into vconcrete or the like and in another position accommodates a male anchor member, the change in the position of the fitting being effected by manipulation `of a fitting retaining means Without the use of` tools.

Another object of the invention resides in a spring biased locking means embodying a detent and a cam arrangement for removably securing an anchor member guide fitting to a handle component, the locking means being of a construction to automatically engage a ledge on the guide fitting with the handle component to eliminate lost motion between the fitting and handle component during anchor member driving operations.

Further objects and advantages are Within the scope of this invention such as relate to the arrangement, operation and function of the related elements of the structure, to various details of construction and to combinations of parts, elements per se, and to'economies of manufacture and numerous other features as Will be apparent from a consideration of the specification and drawing of a form of the invention, which may be preferred, in which:

FIGURE 1 is a side elevational view illustrating a form Vof drive tool of the invention;

FIGURE 2 is a longitudinal `sectional View of the arrangement shown in FIGURE 1; Y

FIGURE 3 is an end View of the construction shown in FIGURE 1;

FIGURE 4 is an enlarged fragmentary detail View of means for removably securing a guide means to a body member, certain parts being shown in section;

FIGURE 5 is an enlarged sectional view taken substantially on the line 5 5 of FIGURE 2. illustrating the guide member retaining means in member retaining position;

plunger portion lo.

Bdd Patented Jan. 5, 1965 FIGURE 6 is a view similar to FIGURE 5 illustrating the guide retaining means in release position;

FiGURE 7 is a fragmentary detail view taken substantially on the line '7-7 of FIGURE 6;

VFIGURE 8 is a fragmentary sectional view illustrating the means for removably retaining the guide member in the toolbody;

FIGURE 9 is an end View of a male anchor member;

FIGURE 10 illustrates a step in the method of aflixing a male anchor stud or member in a body of concrete;

FIGURE 11 is a View similar to FIGURE 10 illustrating the male anchor member in anchored position;

t FIGURE 12 is an isometric view illustrating one form of Wedge element employed in spreading the tines of a male anchor stud or member;

FIGURE 13 is an isometric view illustrating another form of Wedge element for use with a male anchor stud;

FIGURE 14 is a longitudinal sectional view showing.

ber; FIGURE 16 is an isometric View illustrating a form gf wedge or spreading means for a female anchor memer; e

FIGURE 17 is a sectional View similar to FIGURE 14 illustrating the position of the female anchor member in forming a bore in the body of concrete;

FIGURE 18 is a View illustrating the method of shearing a portion of the female anchor member yfrom the anchored portion, and

FIGURE 19 is a detail view illustrating the method of removing a shem'ed portion of the female anchor member from the guide member. v

The drive tool of the present invention is especially adapted for sinking expansible anchor members into floors or Walls of concrete or masonry but the tool may be used for driving other components into concrete or masonry.

Referring to the drawings in detail, the drive tool of the invention is inclusive of the `tubular .or lsleeve-like body or body member 10 which is encased in or surrounded by a sleeve or holder 11 of semi-hard rubber or the like which may be bonded, vulcanized or otherwise secured to the exterior surface of the sleeve-like member recesses 12 to assist the operator in firmly gripping the holder. The holder is provided at its upper end with 'an outwardly extending flange 15 to provide a measure of Vprotection for the hand of the operator.

The tool embodies a removable guide member 34 which is reversible for use in guiding both male and female anchor members and a plunger construction 14 adapted to drive male anchor members into concrete or masonry construction. The plunger 14 includes a portion 16 which is snugly, yet sl-idably fitted within the interior of the body or sleeve member 10. The plunger is provided with a knurled head or anvil portion 17 which is adapted to be struck by a hammer or impact member 18 shown in broken lines.

'Ihe head 1.7 is brazed or otherwise fixedly joined to the end region of the plungersection 16. The plunger construction 1d is bored to snugly receive a plunger section 2t? of lesser diameter than the plunger section 16.`

The end region of the plunger pontion 2li is preferably v knurled or serrated as shown at 22 in FIGURES S, 14 and 17 to iiXedly retain the plunger portionlii in the The plunger portion V16 is provided with a peripheral groove 24 accommodating a rubber O- ring 25 of conventional construction which engages the interior surfaces of the sleeve or body 153 providing -a degree of friction to resist impact reaction which may other- FIGURE 15 is an end view of a female anchor memirte o ber 10is la removable guide member 2S which is re- Y versible. The guide member in one position in the body member 10 serves to guide a male anchor member and, when disposed in a reversed position, another portion of the member 28 serves as a driving means for a femalev anchor member.

The guide member 2S is fashioned with a knurled ange portion y3:0 of enlarged diameter, one portion or tenon 32 extending axially from one side of the knurled portion 30 and a second portion or tenon 34 projecting axially from the opposite side of the knurled ange portion 30, asy particularly shown in FIGURES 2 and 8. As previously mentioned, the guide member 28 is adapted for ready reversible assembly in the body or sleeve l and embodies means for urgingor biasing the ilange 3i) into engagement with the body or sleeve member 10.

With particular reference to FIGURES 1, 2 and 4 through 7, the portion of the sleeve or body 10, projecting beyond the' extremityof the rubber holder 11, supports an annular member or collar 40 having its exterior periphery knurled as shown in FIGURE l. The collar 4t) is rotatable on the supporting portion of the body 10. Formed in the wall portion of member 10 are transverse bores 42 and disposed in each bore is a ball or detent 44.

As particularly shown in FIGURES and 6, each opening 42, adjacent the innerv surface of the sleeve or body 10, is formed with a restricted throat 46 to limit the inward movement of the'detents or balls 44. Formed in the peripheries of the tenon portions 32 and 34 of the guide member 28 and spaced equal distances from the flange portion 30 are grooves or recesses 4S and 50. As particularly shown in FIGURES 1, 2 'and 4, each of the recesses 48 #and 50 is formed by two convergently arranged frusto-conicalfly shaped surfaces 52 joined by a cylindrical surface 54 forming the bottom of each groove.

As particularly shown in FIGURES 2 and 4, the position of the openings or bores 42 in the body. member 10 with respect to the'flange 30 is such that when the end ofthe body member is in engagement with the ange, 'as shown in FIGURES 2 and 4, the detents or balls 44 may move inwardly in contactrwith one of the frustoconically'shaped surfaces 52 so as lto bias the flange 30 into direct contact or abutting engagement with the end of the body member 10.

Resilient means is provided for biasing the balls or detents 44 into locking position. As'particularly shown in FIGURES 5 and 6, the interior region of the collar or annulus 40 yis formed with recesses 56, each recess having -a cam surface 5S which is curved in a direction to converge toward the exterior cylindrical surface of the body 10, the collar 40 being rotatable relative to the body 10. The annulus or collar 40 is Aalso formed interiorly with a circumferential recess 62 adapted to accommodate a coil spring 64.

Struck inwardly from a wall regionvof the'ccllar 4G adjacentY the circumferential recess 62 is a projection 66, shown in FIGURES 5 and 6, which forms an abutment for one end of the coil spring 64. As shown in FIG- URES 4 and 6, the body member It) Vis provided with an opening in which is press tted a pin 68` which forms an abutment for the opposite end of the spring 64. The collar or annulus 46 is provided with an opening into which is driven a pin 70, Whichis employed to 'precompress the spring 64 during assembly.l

After assembly of the pin 63 in the body member 10 gage the pin 68. The spring 64, being under compression, biases the collar 4) for rotation in a clockwise direc- Ition as viewed in FIGURES 5 and 6 to cause the cam surfaces 58 to urge or bias the balls or detents 44 radially inwardly into engagementy with the circular groove or recess Si) formed in the portion 34 of guide member 2S.

As shown in FIGURES 2 and 4, the body member 10 is formed with a pair of peripheral recesses, one at each side of the collar 40, the recesses being yadapted to accommodate split snap rings 72 and 73 which serve to retain the collar 40 on the body member 10. FIGURE 5 illustrates the relative posi-tion of the clutch or locking collar 4@ under the influence of the expansive pressure of spring 64 urging the balls 44 into locking engagement in the groove Si), this locking engagement holding the ange portion 30 against the end of the body member I0, as shown in FIGURES 1, 2, 4 Iand 8 to provide, in

- erTect, a solid metal strut for the transmission of forces -and the collar telescoped over the body t'the pin v may be removed to allow an end of the spring to enof impact of hammer blows onthe head 17.

The 'assembly of guide member 28 with the body 10 as shown in FIGURES 1, 2 and 8 is for the purpose of guiding a male anchor member or stud bolt into a iloor or -wall of concrete. The stud bolt or male anchor member 76 is adapted to be driven by the `arrangement as assembled in FIGURES l, 2 and 8. The male anchor member 76 comprises a body 77, a ledge or shoulder 78 and a threaded tenon v79, an end region of the body portion being formed with one or more slots or kerfs Sti, the end of the body being roughened Vto promote rapid drilling by the anchor member. FIGURE 1 illustrates the initial operation of driving the body 77 of the male stud or anchor member 76 into "a concrete or masonry body 75.

Y The threaded tenon 79 extends intothe -bore in the guide member 28 and the plunger portion 20 engages the end of the tenon 79. The ledge 78 engages in a recess formed in the end of the guide member 2S. The operator grips the rubber handle 11 and strikes the head or anvil 17 repeated blows with a hammer or impact mem- Iber 1S whereby the body 77, in eiect, functions as a drill and is thus driven or sunk into the body of concrete 75, as shown in FIGURE 2, It should be noted that ythe driving force applied to the male anchor member 76 is transmitted through the plunger sections 14, 20, the member 28 serving as a guide means for the anchor member V'Ihe vplunger portieri or section 16 is provided with means for. indicating the depth to which it is desired to drive the stud member 76. As shown in FIGURE 2,

' :the plunger section 16 is formed with lengthwise-spaced peripheral grooves 82 and the grooves painted with different colors providing a visual means for indicating the ,depth of the stud or male anchor member 76 being driven into the concrete body 75.

After the body of the `stud anchor member is driven -to the desired depth, the anchor stud or member is withthe concrete as shown in FIGURE l0.

The operator then strikes the head 16 with a hammer .or other impact instrument to drive the stud body 79 into the bore. As the stud body is progressively driven linto the bore, the wedge 84 is forced further into the kerf Si? spreading the tine portions ofthe stud body 79, formed by the kerf 89, laterally as shown in FIGURE l1 thus permanently anchoring the stud or anchor member in the 'concrete in the position shown in FIGURE l1.

The stud or anchor member 76 may be provided with crossing .kerfs similar to the kerf 80, the kerfs being at right angles one to the other, and with such construction a wedge member such as that shown at 36 in FIGURE 13 is employed, cooperating with the kerfs to spread the tines of the body portion 79 provided by the kerts so as to tixedly anchor the stud member in its recess or opening. The drive tool of the invention is adapted for driving female anchor members of the character shown at t? in FGURES 14 and 17 into a concrete body.

The female anchor member 9E) is inclusive of a cylindrically shaped body 92, the end region to be driven into concrete being formed with an interior frusto-conically shaped hollow region or bore 94 which forms a wall portion, the wall portion being slotted by kerfs 96 providing four tine portions 95. The anchor member 9@ is provided with a threaded bore 9S of a diameter to slidably accommodate the end of the plunger portion 211 as shown in FIGURE 14, the plunger 2b serving as a guide for the anchor member 9i). The opposite end of the anchor member 90 is formed with a'frusto-conically shaped portion 160.

ln the use of the tool for driving the female anchor member 99 into a concrete body 75, the position of the guide member 28 in the body 16, is reversed as shown in FIGURES 14 and 17. In order to reverse the assembly of the guide member 28 with respect to the body member, the operator grasps the annulus or collar 4@ and rotates the same in a counterclockwise direction relative to the body 16 to the position shown in FIGURE 6, the cam surfaces 58 accommodating outward movement of the balls or detents 44 to edect a disengagement of the balls or detents with thergroove 5t).

The operator, while holding the spring'biased coilar 4t) in its relative position of rotation as shown in FIG- URE 6, withdraws the portion 34 of the guide member from its telescoping engagement in the body 1l?, reverses the guide member and inserts the portion 32 thereof into the body 1i) to the position shown in FIGURES 14 and 17. The operator then releases the annulus or collar 49 and, under the influence of the expansive spring 6ft, the collar is rotated to the position shown in FIGURE .5, the cam surfaces 58 biasing the balls or detents 44 into wedging engagement in the groove 4S in the portion 32 of the guide member .as villustrated in FIGURES 14 and 17.

The wedging action of the balls or detents 4d locks the ange or ledge Sil of the guide member 28 in contact or driving engagement with the end of the body 10 as shown in FIGURES 14 and 17.

The body portion 34 of the guide member is formed with a transverse bore 1M which is adapted to accommodate a dritt pin 166 shown in FGURE 19, the purpose of which will -be hereinafter explained. The end region of the portion 34 is preferably formed with a hollow tapered interior 198 as shown in FIGURES 14 and 17.

Formed in the periphery of the anchor member 9@ adjacent the base of the frusto-conically shaped portion 1d@ -is a peripheral recess 1&1 to provide a weakened region adjacent the portion 1th). The end region of the anchor member 9i? toV be driven into a concrete body is serrated or roughened as at 1% providing a plurality of teeth or projections to facilitate driving the anchor member 96* into the concrete body in forming the recess or bore to accommodate the member 9?.

The operation of the arrangement employed for driving or sinking the anchor member 9% of the female type into the concrete body 75 is as follows: The guide member 28 is inserted in the end of the body 1@ by the operator by manipulation of the collar 41B whereby the balls or detents44 engage in the groove 43 to secure the portion 32 in telescoped relation within the body 1l?. The frusto-conically shaped portion 1013 of the anchor member 9@ is engaged in the hollow frusto-conically shapedY end region of portion 33 of the guide member 2S and the plunger portion 2li proiected intorthe threaded bore 9S as shown in FIGURE 14.

In this position of the plunger v20, the head portion 16 on the plunger portion 14 is in direct contact or engagement with the end of the body member 1d thus establishing a solid metal-to-metal drive strut from the head 16 through the guide member 28 to the anchor member 90.

' The operator then strikes the head 16 repeated blows with a hammer or other tool and drives the anchor member 9b into the concrete body 75 to form the bore 1%'. The anchor member is sunk into the body until the recess 191 is ush with the surface of the concrete body as shown in FIGUREl 17.

rThe anchor member 96 and the tool are then moved in a right-hand direction as viewed in FIGUREy 17 to withdraw the anchor member 9h from the bore 195. The wedge member or element 11i), shown in FIGURE 16, is partially entered into the hollow slotted end of the anchor member whereby the fins 112 are partially entered into the slots 96. The body of member 11tl,as shown in FIGURE 16, is of frusto-conical coniiguration to mate with the tapered hollow region 94 of the anchor member.

The anchor member is then reinserted into the recess 1115 and the guide member 28 reengaged with the portion 100 of the anchor member, the wedge member 11i) partially entering the region 94 of the anchor member. The end or base surface 114 of the wedge member 110 engages the bottom of the recess 165. The operator then strikes the head 16 repeated blows with a hammer 'or other instrument to drive the anchor member 911 into the bore to the position shown in FIGURES 17 and 18. In this position the wedge member 11% has moved the tine portions 95 outwardly as shown in FIG- URE 19 to retain the anchor member 96 in the recess 195. When the anchor member has been completely projected into the recess with the peripheral groove 1111 substantially flush with the surface of the concrete body 75, the operator tilts the tool Vto a posit-ion as shown in FIG- URE 18 which tilting effects a fracture of the portion 1th? of the anchor member at the weakened region provided by the circular recess 191. Through this method, the lfemale anchor member @il is iiXedly and permanently anchored in the concretey body without any portion projecting above the surface of the concrete body.

In order tov remove the portion 1% of the anchor member imm engagement with the guide member 28, a dri-ht pin I15816 isdriven through the bore or passage 16%4 the manner shown in FIGURE `19 l.whereby the tapered drift pin ,dislodges the portion lfrom the guide 28, the portion'lltil being then disposed of as waste.

It will be apparent that the drive tool of the invention is vreadily `and quickly rendered adaptable `for driving or sinking 'both rnale'and female anchor members simply by reversing the position of the guide member 2S with respect to the sleeve or body 111B. In the use of the tool for driving or sinking female anchor members, the locking -means hereinbefore described for .locking the `guidey member 2.8 ytothe -body 1? assures metal-to-metal engagement of these components to establish a solid drive thrust or transfer of vforces applied to the anvil or head17 direct to the anchor member 90.

It is apparent that, within the scope of the invention, modifications and different arrangements may be made Vother than as herein disclosed, and the )present disclosure is illustrative merely, the invention comprehending all variations thereof.

We claim:

1. A drive tool for driving anchor elements into masonry construction comprising, in combination, a holder having a sleeve portion, a plunger slidably disposed in said sleeve portion, a guide rnember'sh'aped to receive and engage elements to be driven by the tool, said guide member having a shoulder portion and a cylindrical portion projecting `from each side of the shoulder portion, said cylindrical portions beingaadapted to be selectively entered into the sleeve portion whereby said guide member may be reversibly mounted in said holder with the shoulder portionk engaging an end of the sleeve portion, and rotatably releasable locking means vfor removably retaining the guide .member in assembled relation with the shoulder portion engaging an end of the sleeve portion in either of its positions with the holder.

' 2. A drive tool 4for drivingl anchor elements into masonry construction comprising, in combination, a holder having a sleeve portion, a plunger slidably disposed in said sleeve portion, a guide'member congurated with an opening adapted 'to receive and engage elements to be driven by the tool, said guide member having a shoulder portionr and a cylindrical portion projecting lfrom each side of the shoulder portion, said cylindrical portions being adapted torlbe selectively entered into the sleeveportion with the shoulder portion engaging an end of the sleeve portion and whereby said guide member may be reversibly mounted in said holder, and resilierrtly biased locking means for removably retaining the guide member in assembled relation withk said holder in either of its positions with the shoulder portion engaging an end of the sleeve portion.

3. A drive tool for driving male and female anchor elements into masonry construction comprising, in combination, a holder having a sleeve portion, ay plunger slidably disposed in said sleeve portion, a' guide member being formed with an axial bore to receive elements to be driven by Ithe tool, said guide member having a shoulder portion and :a cylindrical portion projectingA from each side of the yshoulder portion, said cylindrical portions of the guide member being adapted to be selectively entered into the sleeve portion whereby said guide member may be reversibly mounted in said holder with the shoulder portion in contact with the sleeve portion, and resiliently biased rotatable locking means =for removably retaining the yguide :member in assembled relation with the shoulder portion engaging an end of the sleeve portion in either of its positions with said holder, said plunger having an extension arranged to project into the 'bore in said guide member.

4. A drive tool for driving anchor elements into masonry construction comprising,` in combination, a holder having a nonmetallic grip portion, a metal sleeve within the grip portion, -a plunger reciprocably disposed insaid sleeve, a guide member having passage means arranged to receive and engage elements to bedriven by the tool, said guide member having a ilange and a cylindrical portion projecting `from each side of the flange, said cylindrical portions -being adapted to be telescoped into the sleeve whereby said guide member maybe reversibly mounted in said holder with the ange in engagement with an end of the sleeve, and resiliently biased locking means for re- .movably retaining the guide member in assembled relation with the Iflange in engagement with an end of the sleeve in either of its positions with said holder. l

` 5. A drive .tool for driving anchor elements into masonry construction comprising, in combination, a holder having a sleeve portion, a plunger slidably disposed in said sleeve portion, a guide member shaped to receive and engage elements -to be driven by the tool, `said guide member having a flange and a cylindrical portion projecting `from each side of the flange, said cylindrical portions being adapted to be 4selectively entered into the sleeve portion-whereby said guide member may be reversibly mounted in said holder, means for removably retaining the kguide member in either of its assembled positions with the flange Vin engagement with the sleeve portion of the holder, said retaining means including an annular element arranged -or rotatable movement relative to said holder, detent means associated with said sleeve portion, said guide member being `formed with recess means in each cylindrical portion at each. side of the flange arranged to be engaged by said detent means in either position of assembly of the guide member with the holder, and means influencing the annular element toward a position biasing the detent into 8. guide member retaining position Withfthe angc in engagement with the sleeve portion of the holder.

6. A drive tool for driving anchor elements into masoriry construction comprising, in combination, a holder having a sleeve portion, a plunger slidably disposed in said sleeve portion, a guide member formed with a bore arranged to receive and engage elements to be driven by the tool, said guide member having a shoulder portion and a cylindrical tenon projecting from each side of the shoulder portion, said cylindrical tenons being adapted to be entered into the sleeve portion selectively whereby said guide member may be reversibly mounted in said holder with the shoulder portion engaging the sleeve portion in either selected position, means for removably retainingY the guide member in either of its assembled positions with the holder, said retaining means including an annular element .arranged for rotatable movement relative to said holder, detent means'disposed in an opening in said sleeve portion, said guide member being formed with a recess at each side of the shoulder portion arranged to be engaged by said detent in either position of assembly of the guide member with the holder, and resilient means influencing the annular element toward a position biasing the detent into guide member retaining position with the shoulder portion in engagement with the sleeve portion.

7. A drive tool for driving anchor elements into masonry construction comprising, in combination, a holder having a sleeve portion, a plunger slidably disposed in said sleeve portion, a guide member formed with a bore arranged to receive and engage elements to be driven by the tool, said guide member having a shoulder portion and a cylindrical portion projecting from each side of the shoulder portion, said cylindrical portions being adapted to be entered into the sleeve portion selectively whereby said guide member may be reversibly mounted in said holder with the shoulder portion engaging the sleeve portionv in either selected position, means for removably retaining the guide member in either of its assembled positions with the holder, said retaining means including an annular element arranged for rotatable movement relative to said holder, a ball detent disposed in an opening in said sleeve portion, said guide member being formed with a peripheral recess at each side of the shoulder portion arranged to be engaged by said ball detent in either, position of assembly ofthe guide member With the holder, and a spring larranged to bias the annular element toward a position urging the ball detent into a peripheral recess ofthe guide member to hold the shoulder portion in engagement with the sleeve portion.

8. A drive-tool for driving anchor members into a masonry construction comprising, in combination, a body provided with a tubular portion, a guide member shaped to receive `the anchor members and having a ilange portion and cyindrical portions projecting from each side of the ange portion, each of said cylindrical portions being adapted to be selectviely telescoped into the tubular portion of the Ibody with the flange pontion engaging the tubular portion whereby lsaid guide member 4is reversible for use in driving male `and female anchor members, a plunger in said tubular portion for driving an anchor member, a locking detent carried by said tubular portion of the body, detent control means mounted on said body, and resilient means normally biasing said locking detent to a position to retain the guide member in assembled relation with the ange portion in engagement with the tubular portion of the body.

9. A drive tool for driving male and female anchor members into masonry construction comprising, in combination, la body provided with a tubular portion, a guide member formed with a passageV to receive the anchor members and having la flange portion and cylindrical portions progecting from each side of the flange portion, each of said cylindrical portions being adapted to be selectively telescoped into the tubular portion of the body to engage the ange portion with an end of the tubular portion of the body and whereby said guide member is reversible for use in driving male and female anchor members, a circumferential recess in each of said cylindrical portions, a plunger in said tubular portion for driving an `anchor member, a locking detent associated with the tubular portion of the body, an annulus mounted on the tubular portion and arranged for rotatable movement relative to the tubular portion, said annulus having a cam surface arranged to influence the position of said locking detent, and resilient means engaging said annulus to normally bias said detent to a position in engagement in the recess of the cylindrical portion of the guide member extending into the tubular portion of the body to bias the flange portion into engagement With 1an end of the tubular portion of the body and to removably retain the guide member in assembled relation With the body.

10. A drive tool for driving male and female anchor members into masonry construction comprising, in combination, a body provided with a tubular portion, a guide member formed with a passage to receive the anchor members and having a flange portion and cylindrical portions projecting from each side of the flange portion, each of said cylindrical portions being adapted to be selectively telescoped into the tubular portion of the body with the flange portion contacting an end of the tubular portion of the body and whereby said guide member is reversible for use in driving male and female anchor members, a circumferential recess in each of said cylindrical portions, a plunger construction in the tubular portion of the body, said tubular portion of the body being formed with an opening in the wall thereof, a ball detent in said opening, an annulus mounted on the tubular portion and arranged for rotatable movement relative to the tubular portion, said annulus having a cam surface arranged to influence the position of said ball detent, and resilient means engaging said annulus for normally biasing said ball detent to a position in engagement in the recess of the cylindrical portion of the guide member extending into the tubular portion of the body to bias the flange portion of the guide member into contact with an end of the tubular portion of the body and removably retain the guide member in assembled relation with the body.

11. A drive tool for driving male and female anchor members in concrete comprising, in combination, a sleeve,

a plunger slidably disposed in the sleeve and having an anvil portion at one end, a reversible guide member having a flange and a cylindrical portion extending from each side of the flange and arranged to be selectively telescoped into the sleeve with the ange in contact with the sleeve, said guide member being formed with a passage to receive an anchor member, peripheral recesses formed in said cylindrical portions, the sleeve having a wall provided with openings, locking balls in said openings arranged for cooperation with said recesses for biasing the flange into contact with the sleeve and removably retaining the guide member in either of its positions of assembly with the sleeve, an annular rotatable element mounted on said sleeve .formed with earn surfaces engageable with the locking balls for influencing the position thereof, a spring, and abutment means on said element and said sleeve engaged by said spring for normally biasing the element in a direction of rotation to urge the locking balls inwardly of the sleeve for engagement in the adjacent recess in the guide member.

12. A drive tool for driving male and female anchor members in concrete comprising, in combination, a sleeve,

a plunger slidably disposed in the sleeve and having an anvil portion at one end and a portion of reduced dameter within the sleeve, a reversible guide member having a ilange and a cylindrical portion extending from each yside of the flange and arranged to be selectively telescoped into the sleeve with the ange in contact with the sleeve, a bore in said guide member arranged to receive an anchor member and adapted to accommodate the portion of reduced diameter of the plunger, a peripheral recess formed in each of said cylindrical portions, the sleeve having a wall provided with openings, locking balls in said openings arranged for cooperation with said recesses for biasing the flange into contact with the sleeve and removably retaining the guide member in either of its positions vof assembly with the sleeve, an annular element rotatably mounted on said sleeve formed with cam surfaces engageable with the locking balls for inuencing the position thereof, a spring, and abutment means on said element and said sleeve engaged by said spring for normally biasing the element in a direction of rotation to urge the locking balls inwardly of the sleeve for engagement in the adjacent recesses in the guide member, said plunger being formed with indicating means for determining the driving depth of an anchor member.

13. A drive tool for driving male and female anchor members in concrete comprising, in combination, a sleeve, a grip means of nonmetallic material surrounding the sleeve, a plunger slidably disposed in the sleeve and having an anvil portion at one end and a portion of reduced diameter within the sleeve, a reversible guide member having a ilange and a cylindrical portion extending from each side of the flange and arranged to be selectively telescoped into the sleeve with the flange in contact with the sleeve, a bore in said guide member arranged to receive an anchor member and adapted tc accommodate the portion of reduced diameter of the plunger, peripheral recesses formed in said cylindrical portions, the sleeve having a wall provided with openings, locking balls in said openings arranged for cooperation with said recesses for biasing the flange into contact with the sleeve and removably retaining the guide member in either of its positions of assembly with the sleeve, an annular element rotatably mounted on said sleeve formed with cam surfaces engageable with the locking balls for iniluencing the position thereof, a circumferential recess formed interiorly in the annular element, a spring disposed in the recess in said element, and abutment means on said element and said sleeve engaged by said spring for normally biasing the element in a direction of rotation to urge the locking balls inwardly of the sleeve for engagement in the adjacent recess in the guide member.

References Cited in the file of this patent UNITED STATES PATENTS Canada en July 24, 1956 

1. A DRIVE TOOL FOR DRIVING ANCHOR ELEMENTS INTO MASONRY CONSTRUCTION COMPRISING, INCOMBINATION, A HOLDER HAVING A SLEEVE PORTION, A PLUNGER SLIDABLY DISPOSED IN SAID SLEEVE PORTION, A GUIDE MEMBER SHAPED TO RECEIVE AND ENGAGE ELEMENTS TO BE DRIVEN BY THE TOOL, SAID GUIDE MEMBER HAVING A SHOULDER PORTION AND A CYLINDRICAL PORTION PROJECTING FROM EACH SIDE OF THE SHOULDER PORTION, SAID CYLINDRICAL PORTIONS BEING ADAPTED TO BE SELECTIVELY ENTERED INTO THE SLEEVE PORTION WHEREBY SAID GUIDE MEMBER MAY BE REVERSIBLY MOUNTED IN SAID HOLDER WITH THE SHOULDER PORTION ENGAGING AN END OF THE SLEEVE PORTION, AND ROTATABLY RELEASABLE LOCKING MEANS FOR REMOVABLY RETAINING THE GUIDE MEMBER IN ASSEMBLED RELATION WITH THE SHOULDER PORTION ENGAGING AN END OF THE SLEEVE PORTION IN EITHER OF ITS POSITIONS WITH THE HOLDER. 